NCERT Exemplar Solutions Class 9 Science Chapter 7 – Free PDF Download
NCERT Exemplar Solution for Class 9 Science Chapter 7 Diversity in Living Organisms is an ace study material that you can rely on for your exam preparation as well as for a thorough understanding of the topic. Students are advised to solve this NCERT Exemplar together with previous year question papers and NCERT sample papers. To learn the right answers to the questions present in the textbook, students can refer to the NCERT Exemplar Solutions created by individual subject-matter experts having vast knowledge in the subject. Further, all the solutions can be accessed by students for free in both online and offline modes.
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Access Answers to NCERT Exemplar Class 9 Science Chapter 7 – Diversity in Living Organisms
Multiple Choice Questions
1. Find out incorrect sentence
(a) Protista includes unicellular eukaryotic organisms
(b) Whittaker considered cell structure, mode and source of nutrition for classifying the organisms in five kingdoms
(c) Both Monera and Protista may be autotrophic and heterotrophic
(d) Monerans have a well-defined nucleus
Answer is (d) Monerans have a well-defined nucleus
Monerans include single-celled prokaryotes, actinomycetes and photosynthetic blue-green algae. Monerans don’t have a well-defined nucleus and cell organelles.
2. Which among the following has specialised tissue for conduction of water?
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (i) and (iv)
Answer is (c) (iii) and (iv)
Thallophytes and Bryophytes don’t have specialized tissues for water conduction whereas Pteridophytes and Gymnosperms have specialized tissues for conduction of water.
3. Which among the following produce seeds?
Answer is (d) Gymnosperms
Gymnosperms are the flowerless plants that produce seeds. But the seeds are not covered within an ovary and are hence called “naked seeds”.
4. Which one is a true fish?
Answer is (c) Dogfish
Jellyfish is a coelenterate, starfish belongs to Echinodermata and silverfish is an Arthropod.
5. Which among the following is exclusively marine?
Answer is (b) Echinodermata
Echinodermata are exclusively found in the marine environment whereas Porifera, Molluscs and Pisces can be found in both marine and freshwater.
6. Which among the following have an open circulatory system?
(a) (i) and (ii)
(b) (iii) and (iv)
(c) (i) and (iii)
(d) (ii) and (iv)
Answer is (a) (i) and (ii)
Annelida and Coelenterata have closed circulatory system whereas Arthropods and Mollusca have an open circulatory system.
7. In which group of animals, coelom is filled with blood?
Answer is (a) Arthropoda
Annelida, Nematoda and Echinodermata don’t have blood and Arthropods coelom is filled with blood.
8. Elephantiasis is caused by
(d) Liver flukes
Answer is (a) Wuchereria
Wuchereria is a human parasite which causes Elephantiasis. Elephantiasis is spread through mosquitos.
Pinworm is a common intestinal parasite and causes enterobiasis
Planarians are non-parasitic flatworms
Liver flukes are flatworms that cause liver rot in Humans.
9. Which one is the most striking or (common) character of the vertebrates?
(a) Presence of notochord
(b) Presence of triploblastic condition
(c) Presence of gill pouches
(d) Presence of coelom
Answer is (a) Presence of notochord
Presence of triploblastic condition, presence of gill pouches, presence of coelom is found in both vertebrates and invertebrates but Notochord is exclusively present invertebrates.
10. Which among the following have scales?
(a) (i) and (iii)
(b) (iii) and (iv)
(c) (ii) and (iii)
(d) (i) and (ii)
Answer is (c) (ii) and (iii)
Amphibians and mammals don’t have scales on their body whereas Pisces and reptiles have scales on their body.
11. Find out the false statement
(a) Aves are warm-blooded, egg laying and have a four-chambered heart
(b) Aves have feather-covered body, forelimbs are modified into wings and breathe through lungs
(c) Most of the mammals are viviparous
(d) Fishes, amphibians and reptiles are oviparous
Answer is (d) Fishes, amphibians and reptiles are oviparous
Some fishes are viviparous but Amphibians show external fertilization they can neither be kept under oviparous nor be viviparous hence statement (d) is wrong.
12. Pteridophyta do not have
Answer is (c) flowers
13. Identify a member of porifera
Answer is (a) Spongilla
Euglena is a protozoan.
Penicillium is a fungus
Hydra is a Coelenterata
14. Which is not an aquatic animal?
Answer is (d) Filaria
Filaria is a disease caused by Wuchereria. It is spread by Mosquitos.
15. Amphibians do not have the following
(a) Three chambered heart
(b) Gills or lungs
(d) Mucus glands
Answer is (c) Scales
Amphibians have 3 chambered heart. Lungs are present in Adults and Gills are present in tadpoles. Mucous glands are present on the skin of Amphibians.
16. Organisms without nucleus and cell organelles belong to
(a) (i) and (ii)
(b) (iii) and (iv)
(c) (i) and (iv)
(d) (ii) and (iii)
Answer is (b) (iii) and (iv)
Cyanobacteria and archaebacteria are prokaryotes and they do not have a well-defined nucleus and cell organelles.
Fungi and Protista are Eukaryote which posses Cell organelles and nucleus.
17. Which of the following is not a criterion for the classification of living organisms?
(a) Body design of the organism
(b) Ability to produce one’s own food
(c) Membrane-bound nucleus and cell organelles
(d) Height of the plant
Answer is (d) Height of the plant
Height of a plant is an attribute which is related to bushes and trees which are part of Kingdom Plantae hence the height of the trees cannot be a criterion for classification of living organisms.
18. The feature that is not a characteristic of protochordata?
(a) Presence of notochord
(b) Bilateral symmetry and coelom
(c) Jointed legs
(d) Presence of circulatory system
Joined legs is a characteristic feature of Arthropods hence the answer is C)
Protochordata are triploblastic with the bilaterally symmetric body and coelom. They show notochord at some stage of life and they are marine living.
19. The locomotory organs of Echinodermata are
(a) tube feet
(b) muscular feet
(c) jointed legs
Answer is (a) tube feet
Tube feet in Echinodermata help in locomotion and respiration
20. Corals are
(a) Poriferans attached to some solid support
(b) Cnidarians, that are solitary living
(c) Poriferans present at the sea bed
(d) Cnidarians that live in colonies
Answer is (d) Cnidarians that live in colonies
21. Who introduced the system of scientific nomenclature of organisms
(a) Robert Whittaker
(b) Carolus Linnaeus
(c) Robert Hooke
(d) Ernst Haeckel
Answer is (b) Carolus Linnaeus
Carolus Linnaeus introduced binomial nomenclature which is a simplified method of naming organisms. Binomial nomenclature gives each organism a scientific name that has two parts. The first part is a Genus and the second part is Species.
22. Two-chambered heart occurs in
Answer is (b) fish
Amphibians have 3 chambered heart. Aves and crocodile have 4 chambered heart.
23. Skeleton is made entirely of cartilage in
(d) None of these
Answer is (a) Sharks
Sharks are cartilaginous fish whereas Tuna and Rohu are bony fishes.
24. One of the following is not an Annelid
Answer is (d) Urchins
Urchins are Coelenterates
25. The book Systema Naturae was written by
(d) Robert Brown
Answer is (a) Linnaeus
26. Karl Von Linne was involved with which branch of science?
Answer is (b) Taxonomy
27. Real organs are absent in
Answer is (b) Coelenterata
Coelenterates have tissue level organization hence they lack real organs.
28. Hard calcium carbonate structures are used as skeleton by
Echinodermata are spiny skinned organisms which are exclusively free-living marine animals. They are triploblastic and have a coelomic cavity. They use a unique water-driven tube from moving and they contain calcium carbonate structures which are used as a skeleton.
29. Differentiation in segmental fashion occurs in
Answer is (a) Leech
Leech belongs to Annelids and it shows metameric body segmentation.
30. In taxonomic hierarchy family comes between
(a) Class and Order
(b) Order and Genus
(c) Genus and Species
(d) Division and Class
Answer is (b) Order and Genus
31. 5-Kingdom classification is given by
(b) R. Whittaker
Answer is (b) R. Whittaker
R. Whittaker proposed 5 kingdom classification which includes Monera, Protista, Fungi, Plantae and Animalia.
32. Well-defined nucleus is absent in
(a) blue green algae
Answer is (a) blue-green algae
Blue-green algae belong to prokaryotes which do not have a well-defined nucleus and cell organelles.
33. The ‘Origin of Species’ is written by
Answer is (b) Darwin
34. Meena and Hari observed an animal in their garden. Hari called it an insect while Meena said it was an earthworm. Choose the character from the following which confirms that it is an insect.
(a) Bilateral symmetrical body
(b) Body with jointed legs
(c) Cylindrical body
(d) Body with little segmentation
Answer is (b) Body with jointed legs
Body with jointed legs is a characteristic feature of Kingdom Arthropoda and all the insects belong to this kingdom.
Short Answer Questions
35. Write true (T) or false (F)
(a) Whittaker proposed five kingdom classification.
(b) Monera is divided into Archaebacteria and Eubacteria.
(c) Starting from Class, Species comes before the Genus.
(d) Anabaena belongs to the kingdom Monera.
(e) Blue-green algae belong to the kingdom Protista.
(f) All prokaryotes are classified under Monera.
c) Taxonomic hierarchy
e) Blue-green algae belonged to Kingdom Monera
36. Fill in the blanks
(a) Fungi show———mode of nutrition.
(b) Cell wall of fungi is made up of ———.
(c) Association between blue-green algae and fungi is called as———.
(d) Chemical nature of chitin is ———.
(e) ———has smallest number of organisms with maximum number of similar characters
(f) Plants without well-differentiated stem, root and leaf are kept in ———.
(g) ———are called as amphibians of the plant kingdom
- Fungi shows Saprophytic mode of nutrition.
- Cell wall of fungi is made up of Chitin.
- Association between blue green algae and fungi is called as Lichens.
- Chemical nature of chitin is Carbohydrate.
- Species has the smallest number of organisms with a maximum number of similar characters.
- Plants without well-differentiated stem, root and leaf are kept in Thallophyta.
- Bryophytes are called amphibians of the plant kingdom.
37. You are provided with the seeds of gram, wheat, rice, pumpkin, maize and pea. Classify them whether they are monocot or dicot.
38. Match items of column (A) with items of column (B)
(A) – (B)
(a) Naked seed – (A) Angiosperms
(b) Covered seed – (B) Gymnosperms
(c) Flagella – (C) Bryophytes
(d) Marchantia – (D) Euglena
(e) Marsilea – (E) Thallophyta
(f) Cladophora – (F) Pteridophyta
(g) Penicillium – (G) Fungi
(A) – (B)
(a) Naked seed -(B) Gymnosperms
(b) Covered seed -(A) Angiosperms
(c) Flagella -(D) Euglena
(d) Marchantia -(C) Bryophytes
(e) Marsilea -(F) Pteridophyta
(f) Cladophora -(E) Thallophyta
(g) Penicillium -(G) Fungi
39. Match items of column (A) with items of column (B)
(A) – (B)
(a) Pore bearing animals – (A) Arthropoda
(b) Diploblastic – (B) Coelenterata
(c) Metameric segmentation – (C) Porifera
(d) Jointed legs – (D) Echinodermata
(e) Soft bodied animals – (E) Mollusca
(f) Spiny skinned animals – (F) Annelida
(a) Pore bearing animals – (C) Porifera
(b) Diploblastic – (B) Coelenterata
(c) Metameric segmentation – (F) Annelida
(d) Jointed legs – (A) Arthropoda
(e) Soft-bodied animals – (E) Mollusca
(f) Spiny skinned animals – (D) Echinodermata
40. Classify the following organisms based on the absence/presence of true coelom (i.e., acoelomate, pseudocoelomate and coelomate)
Spongilla, Sea anemone, Planaria, Liver fluke
Wuchereria, Ascaris, Nereis, Earthworm,
Scorpion, Birds, Fishes, Horse
Sea anemone- acoelomate
Liver fluke- acoelomate
41. Endoskeleton of fishes are made up of cartilage and bone; classify the following fishes as cartilaginous or bony
Torpedo, Sting ray, Dogfish,
Rohu, Angler fish, Exocoetus
Angler fish- bony
42. Classify the following based on number of chambers in their heart. Rohu, Scoliodon, Frog, Salamander, Flying lizard, King Cobra, Crocodile, Ostrich, Pigeon, Bat, Whale.
Rohu- 2 chambered
Flying lizard-3 chambered
King Cobra-3 chambered
43. Classify Rohu, Scolidon, Flying lizard, King Cobra, Frog, Salamander, Ostrich, Pigeon, Bat, Crocodile and Whale into the cold-blooded/warm-blooded animals.
Rohu- Cold Blooded
Scolidon- Cold Blooded
Flying lizard- Cold Blooded
King Cobra- Cold Blooded
Frog- Cold Blooded
Salamander- Cold Blooded
Ostrich- Warm Blooded
Pigeon- Warm Blooded
Bat- Warm Blooded
Crocodile- Cold Blooded
Whale- Warm Blooded
44. Name two egg-laying mammals.
Billed platypus and the echidna are two egg-laying mammals
45. Fill in the blanks
(a) Five kingdom classification of living organisms is given by ———.
(b) Basic smallest unit of classification is ———.
(c) Prokaryotes are grouped in Kingdom ———.
(d) Paramecium is a protista because of its ———.
(e) Fungi do not contain ———.
(f) A fungus ——— can be seen without microscope.
(g) Common fungi used in preparing the bread is ———.
(h) Algae and fungi form symbiotic association called ———.
(a) Five kingdom classification of living organisms is given by Robert Whittaker.
(b) Basic smallest unit of classification is Species.
(c) Prokaryotes are grouped in Kingdom Monera.
(d) Paramecium is a protista because of its Eukaryotic unicellular morphology.
(e) Fungi do not contain Chlorophyll.
(f) A fungus Mushroom can be seen without microscope.
(g) Common fungi used in preparing the bread is Yeast.
(h) Algae and fungi form symbiotic association called Lichens.
46. Give True (T) and False (F)
(a) Gymnosperms differ from Angiosperms in having covered seed.
(b) Non-flowering plants are called Cryptogamae.
(c) Bryophytes have conducting tissue.
(d) Funaria is a moss.
(e) Compound leaves are found in many ferns.
(f) Seeds contain an embryo.
47. Give examples for the following
(a) Bilateral, dorsiventral symmetry is found in———.
(b) Worms causing disease elephantiasis is———.
(c) Open circulatory system is found in———where coelomic cavity is filled with blood.
(d) ———are known to have pseudocoelom.
(a) Bilateral, dorsiventral symmetry is found in Liver Fluke.
(b) Worms causing disease elephantiasis is Filarial worm.
(c) Open circulatory system is found in Arthropods where coelomic cavity is filled with blood.
(d) Nematodes are known to have pseudocoelom.
48. Label a,b,c and d. given in Fig. 7.1 Give the function of (b)
- Dorsal fin
- Caudal fin
- Pelvic fin
- Pectoral fin
49. Fill in the boxes given in Fig. 7.2 with appropriate characteristics/plant group (s)
- Vascular tissue without specialization
- Bare naked seeds
- Seeds with two cotyledons
Multiple Choice Questions
50. Write names of few thallophytes. Draw a labelled diagram of Spirogyra.
Ulothrix, Spirogyra, Cladophara, Ulva and Chara are few of the examples for Thallophytes
51. Thallophyta, bryophyta and pteridophyta are called as ‘Cryptogams’. Gymnosperms and Angiosperms are called as ‘phanerogams’. Discuss why? Draw one example of Gymnosperm.
Thallophyta, bryophyta and pteridophyta are called as ‘Cryptogams’ because the reproductive organs of plants in all these three groups are very inconspicuous, and they are therefore called ‘cryptogams’, or ‘those with hidden reproductive organs’. In these plants seeds are absent.
Example : Pinus
Gymnosperms and Angiosperms are called as ‘phanerogams’ because these are the plants with well-differentiated reproductive parts that ultimately make seeds.
52. Define the terms and give one example of each
(a) Bilateral symmetry
- An organism with body shapes that are mirror images along a middle line. The internal organs, however, are not necessarily distributed symmetrically. Example: Liver fluke
- The coelom is a body cavity filled with fluid. Fluid runs the complete length of vertebrates to divide the body of an organism into the inner tube and outer tube is called Coelom Example: Butterfly
- Animals that have 3 embryonic cell layers from which differentiated tissues are made are called triploblastic organisms. Ex: Star Fish
53. You are given leech, Nereis, Scolopendra, prawn and scorpion; and all have segmented body organisation. Will you classify them in one group? If no, give the important characters based on which you will separate these organisms into different groups.
The organisms given in the question does not belong to a common group of organisms. Leech and Nereis are annelids but Scolopendra, prawn and scorpion are arthropods
Annelids have a metamerically segmented body. Metamerically segmented body is divided into many segments internally by septa. From head to tail body segments are lined up one after the other. Arthropods have jointed legs and open circulating system.
54. Which organism is more complex and evolved among Bacteria, Mushroom and Mango tree. Give reasons.
Among Bacteria, Mushroom and Mango tree; Mango tree is the complex and evolved organism Because it is Eukaryotic, multicellular, autotrophic terrestrial plant. It is an angiosperm and its seeds are covered within the ovary. Its reproductive organs and accumulated in the flower hence it is called as a flowering plant.
Bacteria are prokaryotic unicellular organisms and fungi are heterotrophic thallophytes with no body differentiation. Hence mango tree is evolved more than bacteria and fungi.
55. Differentiate between flying lizard and bird. Draw the diagram.
|Ser. No||Flying lizard is a reptile- class Reptilia||Bird belongs to class-Aves.|
|1||Ectothermic or cold-blooded, terrestrial or aquatic vertebrates.||Warm-blooded, tetrapodous vertebrates (birds) with various flight adaptations. Size ranges from the smallest hummingbird to largest ostrich.|
|2||Body covered with dry water-proof skin having horny epidermal scales or dermal acute plates.||Persist on the feet but feathers cover most of the body.|
|3||The body varies in form and is usually divided into head, neck, trunk and tail.||Spindle or boat-shaped body is divisible into head, neck, trunk and tail.|
|4||Limbs are tetrapods pentadactyl (five-toed) type; with clawed digits (limbs are absent in snakes and some lizards).||Fore-limbs modified into wings for flight, Hind-limbs bear four clawed digits and are adapted for walking, perching, or swimming.|
|5||Teeth are present in all reptiles except in tortoises and turtles.||Narrow jaws form a horny beak, which is modified for different purpose. Teeth are absent.|
|6||Respiration is through lungs only. No gills are present.||They breathe through lungs.|
|7||Heart is three-chambered and is divided into two auricles and an incompletely divided ventricle. Only crocodiles have a four-chambered heart.||Four-chambered heart with two auricles and two ventricles.|
|8||Fertilisation is internal. Most reptiles are oviparous and lay their eggs with tough covering and do not need to lay their eggs in water. A few reptiles are viviparous, (e.g., lizards and snakes). No aquatic larval stage.||Fertilization is internal. They are oviparous and lay large, yolk-laden eggs having a hard shell.|
56. List out some common features in cat, rat and bat.
- All are Eukaryotes
- They are multicellular
- They are heterotrophic in nature
- All Have Notochord
- Presence of four-chambered heart
- Have a dorsal nerve cord
- All are triploblastic
- Have paired gill pouches
- They are coelomate.
57. Why do we keep both snake and turtle in the same class?
Because both have a certain common feature which is listed below.
- These animals are cold-blooded
- They have scales and breathe through lungs
- Both of them have a three-chambered heart
- Both of them lay eggs with tough coverings and do not need to lay their eggs in water
Concepts of the NCERT Exemplar Solutions for Class 9 Science Chapter 7
- Importance of classification
- Basis of classification
- Classification system
- 5 kingdom classification
- 2 kingdom classification
- Order of classification
- Types of cellular organisation
- Body organization
- Method of obtaining food
- 5 kingdom classification –
- Porifera or sponges
- Cold blood organisms
- Warmblood organisms
- Conventions in writing scientific names
Diversity in Living Organisms is a theoretical topic which needs a lot of practice to write the right answers in the examination. In order to make your reading and understanding easier BYJU’S brings, videos, animations, info-graphics, NCERT Solutions, Worksheets and exercise which will make you comprehend with this volatile topic. To watch this interesting video subscribe BYJU’S YouTube channel.
Frequently Asked Questions on NCERT Exemplar Solutions for Class 9 Science Chapter 7
What will I learn from the Chapter 7 of NCERT Exemplar Solutions for Class 9 Science?
4. Importance of classification
5. Basis of classification
6. Classification system
7. 5 kingdom classification
8. 2 kingdom classification
9. Order of classification
10. Types of cellular organisation
11. Body organization
12. Method of obtaining food
13. 5 kingdom classification – Fungi, Monera, Protista, Animalia, Plantae, Porifera or sponges, Coelenterata, Mollusca, Arthropoda, Echinodermata, Protochordata, Nematoda, Vertebrata, Cold blood organisms, Warmblood organisms, Pisces, Amphibia, Reptilia, Aves, Mammalia, Nomenclature, Conventions in writing scientific names
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